[dns-operations] co-operative cacheing

[Paul Vixie]

> As for a solution I'd tend to lean towards memcached , It's distributed,
> fast, popular and supported by the language of most people's choice.

memcached looks to be at least one order of magnitude too slow for this use,
but even with something faster like nmesia, it's still an extra round trip
unless it's done in parallel.  if we're doing to do a second udp transaction
in parallel then we can just use udp/53 for it (with a very short timeout 
and recursion-undesired.)